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| Keywords: The Quarterly journal of the Geological Society of London (13205884793).jpg 156 <br> PROCEEDINGS OF THE GEOLOGICAL SOCIETY DeC 16 <br> ment of these rocks more nearly resembles that of Westmoreland than <br> that of the typical country of Siluria I believe also that the distri- <br> bution of the fossils through the subordinate divisions of these rocks <br> in South Wales agrees more exactly with their distribution in West- <br> moreland than it does with their distribution in Siluria ” proving <br> that within the narrow limits of our island the distribution of <br> fossils through subordinate groups depends far more on physical <br> conditions than on geographical latitude The highest group or <br> Tilestone contains in South Wales a very fine series of fossils <br> the greatest part of which occur also among the grits slates and <br> flags of Kirkby Lonsdale and in the ridges between Kendal and the <br> lower valley of the Lune 2ndly With many points of most intimate <br> resemblance between the Upper Silurian groups of Westmoreland and <br> South Wales there are points of specific diflference worth notice <br> Thus the Cardiola interrupta has a much greater vertical range in <br> this part of South Wales than it has in Westmoreland Again in <br> these two widely-separated localities the Terehratula Navicula com- <br> mences nearly on the same horizon In Westmoreland it does not <br> ascend into the Upper Ludlow series south of Kendal ; but in this <br> part of South Wales the species ascends through the whole Upper <br> Ludlow series and abounds even among the red flags of the Tile- <br> stone close to the base of the Old red sandstone My limits forbid <br> me to follow these points of diiFerence and resemblance any farther <br> Groups of the whole Cambrian Series including both North and <br> South Wales <br> Westmoreland <br> Carboniferous <br> Old Red <br> Upper Silurian <br> Lower Silurian J <br> Upper Cambrian <br> Slates <br> Snowdonian Group <br> Tremadoc Group <br> Crystalline Slates <br> Carboniferous <br> Upper Silurian <br> Coniston Limestone <br> Lower Silurian <br> Cumbrian Slates <br> Skiddaw Slate 36932885 113687 51125 Page 156 Text v 3 http //www biodiversitylibrary org/page/36932885 1847 Geological Society of London NameFound Cardiola interrupta NameConfirmed Cardiola interrupta NameBankID 7004591 NameFound Navicula NameConfirmed Navicula EOLID 11750 NameBankID 3868892 Biodiversity Heritage Library The Quarterly journal of the Geological Society of London v 3 1847 Geology Periodicals Smithsonian Libraries bhl page 36932885 dc identifier http //biodiversitylibrary org/page/36932885 smithsonian libraries Information field Flickr posted date ISOdate 2014-03-17 Check categories 2015 August 26 CC-BY-2 0 BioDivLibrary https //flickr com/photos/61021753 N02/13205884793 2015-08-26 12 53 47 cc-by-2 0 PD-old-70-1923 The Quarterly journal of the Geological Society of London 1847 Photos uploaded from Flickr by Fæ using a script | ||||
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